diff --git a/tests/mock/cache.php b/tests/mock/cache.php
index 11e525ff79..020574b0bb 100644
--- a/tests/mock/cache.php
+++ b/tests/mock/cache.php
@@ -41,6 +41,28 @@ class phpbb_mock_cache
 	{
 		return $this->data['_bots'];
 	}
+	
+	/**
+	 * Obtain list of word censors. We don't need to parse them here,
+	 * that is tested elsewhere.
+	 */
+	public function obtain_word_list()
+	{
+		return array(
+			'match'		=> array(
+				'#(?<![\\p{Nd}\\p{L}_-])([\\p{Nd}\\p{L}_-]*?badword1[\\p{Nd}\\p{L}_-]*?)(?![\\p{Nd}\\p{L}_-])#iu',
+				'#(?<![\\p{Nd}\\p{L}_-])([\\p{Nd}\\p{L}_-]*?badword2)(?![\\p{Nd}\\p{L}_-])#iu',
+				'#(?<![\\p{Nd}\\p{L}_-])(badword3[\\p{Nd}\\p{L}_-]*?)(?![\\p{Nd}\\p{L}_-])#iu',
+				'#(?<![\\p{Nd}\\p{L}_-])(badword4)(?![\\p{Nd}\\p{L}_-])#iu',
+			),
+			'replace'	=> array(
+				'replacement1',
+				'replacement2',
+				'replacement3',
+				'replacement4',
+			),
+		);
+	}
 
 	public function set_bots($bots)
 	{
diff --git a/tests/mock_user.php b/tests/mock_user.php
index 74d31c4c4a..a6ff5f6628 100644
--- a/tests/mock_user.php
+++ b/tests/mock_user.php
@@ -17,4 +17,16 @@ class phpbb_mock_user
 {
 	public $host = "testhost";
 	public $page = array('root_script_path' => '/');
+	
+	public function optionget($item)
+	{
+		switch ($item)
+		{
+			case 'viewcensors':
+				return false;
+			
+			default:
+				trigger_error('Option not found, add it to the mock user object.');
+		}
+	}
 }
diff --git a/tests/text_processing/censor_text_test.php b/tests/text_processing/censor_text_test.php
new file mode 100644
index 0000000000..3820a1135f
--- /dev/null
+++ b/tests/text_processing/censor_text_test.php
@@ -0,0 +1,73 @@
+<?php
+/**
+*
+* @package testing
+* @copyright (c) 2008 phpBB Group
+* @license http://opensource.org/licenses/gpl-license.php GNU Public License
+*
+*/
+
+require_once dirname(__FILE__) . '/../../phpBB/includes/functions.php';
+require_once dirname(__FILE__) . '/../../phpBB/includes/functions_content.php';
+require_once dirname(__FILE__) . '/../mock_user.php';
+require_once dirname(__FILE__) . '/../mock/cache.php';
+
+class phpbb_text_processing_censor_text_test extends phpbb_test_case
+{
+	public function censor_text_data()
+	{
+		global $cache, $user;
+		$cache = new phpbb_mock_cache;
+		$user = new phpbb_mock_user;
+
+		return array(
+			array('', ''),
+
+			array('badword1', 'replacement1'),
+			array(' badword1', ' replacement1'),
+			array('badword1 ', 'replacement1 '),
+			array(' badword1 ', ' replacement1 '),
+			array('abadword1', 'replacement1'),
+			array('badword1w', 'replacement1'),
+			array('abadword1w', 'replacement1'),
+			array('anotherbadword1test', 'replacement1'),
+			array('this badword1', 'this replacement1'),
+			array('this badword1 word', 'this replacement1 word'),
+
+			array('badword2', 'replacement2'),
+			array('bbadword2', 'replacement2'),
+			array('bbbadword2', 'replacement2'),
+			array('badword2d', 'badword2d'),
+			array('bbadword2d', 'bbadword2d'),
+			array('test badword2', 'test replacement2'),
+			array('test badword2 word', 'test replacement2 word'),
+
+			array('badword3', 'replacement3'),
+			array('bbadword3', 'bbadword3'),
+			array('badword3d', 'replacement3'),
+			array('badword3ddd', 'replacement3'),
+			array('bbadword3d', 'bbadword3d'),
+			array(' badword3 ', ' replacement3 '),
+			array(' badword3', ' replacement3'),
+
+			array('badword4', 'replacement4'),
+			array('this badword4 word', 'this replacement4 word'),
+			array('abadword4', 'abadword4'),
+			array('badword4d', 'badword4d'),
+			array('abadword4d', 'abadword4d'),
+
+			array('badword1 badword2 badword3 badword4', 'replacement1 replacement2 replacement3 replacement4'),
+			array('badword1 badword2 badword3 badword4d', 'replacement1 replacement2 replacement3 badword4d'),
+			array('abadword1 badword2 badword3 badword4', 'replacement1 replacement2 replacement3 replacement4'),
+		);
+	}
+
+	/**
+	* @dataProvider censor_text_data
+	*/
+	public function test_censor_text($input, $expected)
+	{
+		$label = 'Testing word censor: ' . $input;
+		$this->assertEquals(censor_text($input), $expected, $label);
+	}
+}